After the big three of Demaryius Thomas, Wes Welker and Eric Decker, the Broncos have had a fierce competition for the No. 4 and 5 receiver spots. Greg Orton made an early move but then suffered a severely sprained ankle.

Andre “Bubba” Caldwell had been the No. 4 receiver in recent weeks and fifth-round drafted rookie Tavarres King seemed to have the edge for No. 5.

But Gerell Robinson has been mixing in with the top offense in recent days. Robinson was a late cut by the Broncos as an undrafted rookie last season, then was signed to the Arizona Cardinals’ practice squad.

Injury update

Broncos cornerback Champ Bailey was still hobbling on crutches and wearing a boot on his injured left foot Wednesday. Slot receiver Wes Welker (Wednesday) returned to practice on a limited basis. Defensive end Robert Ayers (foot) and center-guard Ryan Lilja (veteran rest) missed practice Wednesday.